Seiko Cal. 6257 - 139

Seiko 6257-139

The 6257-139 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6257 caliber with 26j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-43ac66338530]

Also known as: Bullhead

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
9.8mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Green
Jewels
26j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1967

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seikata-wm-43ac66338530